linux-kernel - Re: [PATCH] target/file: don't zero iter before iov_iter

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Message-ID: <yq11rep2yey.fsf@ca-mkp.ca.oracle.com>
Date:   Wed, 13 Jan 2021 00:34:03 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Pavel Begunkov <asml.silence@...il.com>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] target/file: don't zero iter before iov_iter_bvec


Pavel,

> iov_iter_bvec() initialises iterators well, no need to pre-zero it
> beforehand as done in fd_execute_rw_aio(). Compilers can't optimise it
> out and generate extra code for that (confirmed with assembly).

Applied to 5.12/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering